diff --git a/node_modules/mdl-ext/src/collapsible/_collapsible.scss b/node_modules/mdl-ext/src/collapsible/_collapsible.scss
new file mode 100644
index 0000000..745676d
--- /dev/null
+++ b/node_modules/mdl-ext/src/collapsible/_collapsible.scss
@@ -0,0 +1,36 @@
+@charset "UTF-8";
+
+/**
+ * @license
+ * Copyright 2016-2017 Leif Olsen. All Rights Reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * This code is built with Google Material Design Lite,
+ * which is Licensed under the Apache License, Version 2.0
+ */
+
+.mdlext-collapsible {
+  box-sizing: border-box;
+  cursor: pointer;
+}
+
+.mdlext-collapsible-group,
+.mdlext-collapsible-region {
+  box-sizing: border-box;
+
+  &[hidden] {
+    @include mdlext-visually-hidden;
+    pointer-events: none;
+  }
+}